Create A Photoshop Script In Adobe CS6 Mac that will create a grunge border on folder of images

Hi We require a small project to create a photoshop script In Adobe CS6 Mac that will create a grunge border on a folder of images. In effect the border becomes the eraser tool and deletes the edge of the image and leaves transparent background. I would like the ability if possible to randomise a series of different grunge borders so that a folder of 100 designs will have random grunge borders. It would need to be easy to add and remove borders. We can choose borders once project has been won. As an add on to this, if its possible to select a filter that can be run before script is run that would be great. `if required, like texturiser.